I hope you're all doing well. I have a question regarding form validation in HTML using PHP and regular expressions with preg_match. I've been working on a project and I'm stuck at this particular step.
To provide you with some context, in my project, I have an HTML form that collects user input such as name, email, phone number, and so on. Now, I want to ensure that the user input follows a certain format. For example, I want the name field to only accept alphabetic characters, the email field to have a valid email format, and the phone number field to only accept numeric characters.
After doing some research, I came across the preg_match function in PHP, which uses regular expressions to match patterns. It seems like this function can be helpful in validating the user input based on certain patterns. But unfortunately, I'm not very familiar with regular expressions, so I'm a bit confused about how to use preg_match effectively.
I was wondering if any of you could provide me with some guidance or examples on how to use preg_match with regular expressions for form validation in PHP. Specifically, it would be great if someone could explain the syntax of a few common regular expressions that can be used to validate names, emails, and phone numbers.
Your help would be greatly appreciated! Thank you in advance.